"If you had a big volcanic eruption of this sort [globally devastating], let's say in the middle of Europe today, the effects would be enormous and a few months might not be enough to get your act together." http://www.nature.com/nature/journal/v482/n7383/full/nature10706.html

A review of historical records was performed for 350 years of global volcanic activity (1650-2009) and seismic (earthquake) activity for the past 300 years (1700 to 2009) within the continental United States and then compared to the Sun’s record of sunspots as a measure of solar activity.

According to this study, there exists a strong correlation between solar activity and the Earth’s largest seismic and volcanic events.

The huge electric galactic center-magnetar sends electricity to all the Milky-way [Eatough R. P. et al]. In our solar system, mostly Jupiter and secondly the other planets periodically divert a part of this electricity (that stimulates them) from its course to the Sun, causing him a solar minimum and to the Earth more atmospheric and magma stimulation: more thunderbolts [Gurevich A.] (even from CLEAR sky, without clouds), storms, quakes [Simpson J., Jain R.] and volcanic eruptions-clouding-glacials [Ebisuzaki et al], all AVERTABLE with proper MESHES [global-providence.info] over active craters and the equator, where from most electricity hits our planet.

The reason why the sunspot cycle is averagely 11 years is because the charge-discharge of Jupiter lasts as long as it takes him to evolve around the Sun [Efthimiu] and it depends on the other planets' positions [Wilson I. R. G.].

WE CAN SHIELD active craters (as satellites and spacecrafts are already shielded), to stop cosmic rays stimulating magma and causing another devastating volcanic ice-age, such those that vanished pharaohs, Romans, Mayas, Aztecs, Incas and many other populations.